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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Prevent the cow from getting an infection from the calve






2. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






3. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






4. Start of the reproductive tract for the female. located outside of the body






5. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






6. 19-23 (21) days






7. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






8. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






9. 30 hours after estrus begins






10. What helps regulate spermatogenesis?






11. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






12. Luteolysis happens because of the ____________ hormone






13. Failure to have both testis (gonads) descend






14. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






15. Scar tissue plugs up chambers of udder






16. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






17. Important 'landmark' during palpation






18. 283 days






19. (LH) causes female's egg to break (her period)






20. Contains and regulates the temp of the testes for sperm production






21. Animals which have only one estrous cycle (ex: dog - fox)






22. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






23. When are steers and heifers weaned from bottle feeding?






24. 1. brain function - 2. blood flow - 3. willing female






25. (male) pushes the testes outward toward the legs for a cool-down off of the body






26. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






27. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






28. Failure to have one testis (gonad) to descend






29. Why does estrus happen before ovulation?






30. Days which have increasing daylight hours

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31. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






32. Sperm is produced here






33. Duct through penis that carries sperm and urine






34. 30 hours after estrus begins






35. FEED






36. 19-23 (21) days






37. Depository for semen during insemination. where urine leaves the body






38. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






39. 24 hours before end of estrus cycle






40. 19-23 (21) days






41. Microscopic - make sure not sterile - very few bulls are actually tested






42. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






43. Front feet and head first. (except for hogs and dogs)






44. Important 'landmark' during palpation






45. 45-60 days after breeding; re-breed as required






46. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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47. 2 month growth cycle. stored in the epididymis of the bull






48. Can survive ~7 days in cow. vast majority <48 hours






49. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






50. (FSH) causes egg to mature in females